01-Preparation-of-data.ipynb

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    "<img width=\"800px\" src=\"../fidle/img/00-Fidle-header-01.svg\"></img>\n",
    "\n",
    "# <!-- TITLE --> [GTS1] - CNN with GTSRB dataset - Data analysis and preparation\n",
    "<!-- DESC --> Episode 1 : Data analysis and creation of a usable dataset\n",
    "<!-- AUTHOR : Jean-Luc Parouty (CNRS/SIMaP) -->\n",
    "\n",
    "## Objectives :\n",
    " - Understand the **complexity associated with data**, even when it is only images\n",
    " - Learn how to build up a simple and **usable image dataset**\n",
    "\n",
    "The German Traffic Sign Recognition Benchmark (GTSRB) is a dataset with more than 50,000 photos of road signs from about 40 classes.  \n",
    "The final aim is to recognise them !  \n",
    "\n",
    "Description is available there : http://benchmark.ini.rub.de/?section=gtsrb&subsection=dataset\n",
    "\n",
    "\n",
    "## What we're going to do :\n",
    "\n",
    " - Understanding the dataset\n",
    " - Preparing and formatting enhanced data\n",
    " - Save enhanced datasets in h5 file format\n"
   ]
  },
  {
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   "source": [
    "## Step 1 -  Import and init\n",
    "### 1.1 - Python"
   ]
  },
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      "\n",
      "FIDLE 2020 - Practical Work Module\n",
      "Version              : 0.4.2\n",
      "Run time             : Friday 28 February 2020, 09:23:59\n",
      "TensorFlow version   : 2.0.0\n",
      "Keras version        : 2.2.4-tf\n"
     ]
    }
   ],
   "source": [
    "import os, time, sys\n",
    "import csv\n",
    "import math, random\n",
    "\n",
    "import numpy as np\n",
    "import pandas as pd\n",
    "import matplotlib.pyplot as plt\n",
    "import h5py\n",
    "\n",
    "from skimage.morphology import disk\n",
    "from skimage.filters import rank\n",
    "from skimage import io, color, exposure, transform\n",
    "\n",
    "from importlib import reload\n",
    "\n",
    "sys.path.append('..')\n",
    "import fidle.pwk as ooo\n",
    "\n",
    "ooo.init()"
   ]
  },
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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 1.2 - Where are we ?"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
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   "outputs": [
    {
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     "text": [
      "Well, we should be at GRICAD !\n",
      "We are going to use: /bettik/PROJECTS/pr-fidle/datasets/GTSRB\n"
     ]
    }
   ],
   "source": [
    "place, dataset_dir = ooo.good_place( { 'GRICAD' : f'{os.getenv(\"SCRATCH_DIR\",\"\")}/PROJECTS/pr-fidle/datasets/GTSRB',\n",
    "                                       'IDRIS'  : f'{os.getenv(\"WORK\",\"\")}/datasets/GTSRB',\n",
    "                                       'HOME'   : f'{os.getenv(\"HOME\",\"\")}/datasets/GTSRB'} )"
   ]
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   "source": [
    "## Step 2 - Read the dataset\n",
    "Description is available there : http://benchmark.ini.rub.de/?section=gtsrb&subsection=dataset\n",
    " - Each directory contains one CSV file with annotations (\"GT-<ClassID>.csv\") and the training images\n",
    " - First line is fieldnames: Filename;Width;Height;Roi.X1;Roi.Y1;Roi.X2;Roi.Y2;ClassId  \n",
    "    \n",
    "### 2.1 - Understanding the dataset\n",
    "The original dataset is in : **\\<dataset_dir\\>/origine.**  \n",
    "There is 3 subsets : **Train**, **Test** and **Meta**.  \n",
    "Each subset have an **csv file** and a **subdir**.\n",
    "    "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
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       "      <th>Width</th>\n",